Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

Anatomy & Physiology

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

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Multiple Choice

Which of the following muscles is primarily responsible for flexing the wrist and hand?

Flexor carpi radialis

Extensor carpi ulnaris

Pronator teres

Brachioradialis

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Verified step by step guidance

Step 1: Understand the function of each muscle listed in the options. The Flexor carpi radialis is primarily responsible for flexing the wrist and hand. The Extensor carpi ulnaris extends and adducts the wrist, the Pronator teres pronates the forearm, and the Brachioradialis flexes the forearm at the elbow.

Step 2: Recall the anatomical location and action of the Flexor carpi radialis. It is located on the anterior side of the forearm and plays a key role in wrist flexion.

Step 3: Compare the actions of the other muscles listed. Extensor carpi ulnaris is located on the posterior side of the forearm and is involved in wrist extension, not flexion. Pronator teres is involved in forearm pronation, and Brachioradialis is involved in elbow flexion.

Step 4: Eliminate the incorrect options based on their primary functions. Since the question asks for the muscle responsible for flexing the wrist and hand, only the Flexor carpi radialis matches this description.

Step 5: Confirm your understanding by visualizing or referencing the anatomical position and function of the Flexor carpi radialis to ensure it aligns with the question's requirements.